<template>
    <el-container class="home-container">
<!--      头部区域-->
      <el-header>
        <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <el-container>
<!--        左侧菜单区域-->
        <el-aside :width="isCollapse?'64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <el-menu background-color="#333744" text-color="#fff"
            active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router
                   :default-active="activePath">
<!--            一级菜单-->
            <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
<!--              一级菜单模板区域-->
              <template slot="title">
                <i :class="iconsObj[item.id]"></i>
                <span>{{item.authName}}</span>
              </template>
<!--              二级菜单-->
                <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children" :key="subItem.id"
                @click="saveActivePath('/'+subItem.path+'')" >
<!--                  二级菜单模板区域-->
                  <template slot="title">
                    <i class="el-icon-menu"></i>
                    <span>{{subItem.authName}}</span>
                  </template>
                </el-menu-item>
            </el-submenu>

          </el-menu>
        </el-aside>
<!--        右侧内容主体-->
        <el-main><router-view></router-view></el-main>
      </el-container>
    </el-container>
</template>

<script>
    export default {
      data() {
        return {
          //是否折叠的标志（默认不折叠）
          isCollapse: false,
          //被激活的链接
          activePath: '',
          menuList: [],
          iconsObj: {
            '125': 'iconfont icon-user',
            '103': 'iconfont icon-tijikongjian',
            '101': 'iconfont icon-shangpin',
            '102': 'iconfont icon-danju',
            '145': 'iconfont icon-baobiao',
          }
        }
      },
      name: "Home",
      //在生命周期函数created中调用getMenuList，即当页面加载完成时，获取菜单列表
      created() {
        this.getMenuList();
        this.activePath = window.sessionStorage.getItem('activePath')
      },
      methods: {
        logout() {
          //退出功能，原理是清除客户端中的token
          window.sessionStorage.clear();
          this.$router.push('/login');
        },
        async getMenuList() {
          const {data: res} = await this.$http.get('menus');
          this.menuList = res.data;
          // console.log(res);
          // console.log(this.menuList);
        },
        //点击按钮，切换左侧菜单的样式(折叠、还原)
        toggleCollapse() {
          this.isCollapse = !this.isCollapse;
        },
        saveActivePath(activePath) {
          window.sessionStorage.setItem('activePath', activePath);
          this.activePath = activePath;
        }
      }
    }
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      > span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: 0;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont {
    margin-right: 10px;
  }
  .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    /*letter-spacing可用于设置字与字间的间距*/
    letter-spacing: 0.2em;
    /*设置鼠标移到到此盒子时，样式变为小手*/
    cursor: pointer;
  }
</style>

